The down-versus-synthetic battle is over, and it’s win-win. Synthetic Spirafil® on the ground level, for max warmth in compression zones, and water-resistant 650-fill-power down on top allow the Scandium to deliver supreme warmth while in extreme cold. Part of the Marmot Composite series, the Scandium is constructed with nylon ripstop and polyester shell, and decked out with the most intuitive and ergonomic features.